Every time I close the lid of my notebook, the system suspends (no matter if it's on battery power or plugged in).But I can't choose anything in my power settings for the option "When the lid is closed". There is only a blank entry in both cases.

Exactly the same here too. Both the dropdowns for "on battery" and "on power" are blank with no options available. Ideally I would prefer laptop NOT to sleep when powered up. Is this a bug or is there a package missing which can fix the issue.